You can carefully decompose/destroy butyl lithium using isopropanol, if it is still active. You may take help from an experience chemist from Chemistry department. Dilute with an unreactive solvent such as heptane or toluene and place the bottle in an ice water cooling bath. Slowly add isopropanol to quench butyl lithium. Upon completion, add methanol as a more reactive quenching agent to ensure completion. Finally, add water drop-wise to make sure there are no pockets of reactive materials. Upon prolonged exposure to air butyl lithium converts to lithium hydroxide, so I do not think that material is still active.

You may also transfer that material using a heavy secondary containment across the campus and butyl lithium is not shock sensitive.

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